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| 型号： | AD8222BCPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST DUAL PREC LN 16LFCSP |
| 产品培训模块： | Instrumentation Amplifiers Performance |
| 标准包装： | 1 |
| 放大器类型： | 仪表 |
| 电路数： | 2 |
| 转换速率： | 2 V/µs |
| -3db带宽： | 1.2MHz |
| 电流 - 输入偏压： | 200pA |
| 电压 - 输入偏移： | 60µV |
| 电流 - 电源： | 900µA |
| 电流 - 输出 / 通道： | 18mA |
| 电压 - 电源，单路/双路(±)： | 4.6 V ~ 36 V，±2.3 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-VQ |
| 包装： | 标准包装 |
| 产品目录页面： | 771 (CN2011-ZH PDF) |
| 其它名称： | AD8222BCPZ-R7DKR |
AD8222
Rev. A | Page 18 of 24
INPUT PROTECTION
All terminals of the AD8222 are protected against ESD (1 kV,
human body model). In addition, the input structure allows for
dc overload conditions of about 2.5 V beyond the supplies.
Input Voltages Beyond the Rails
For larger input voltages, an external resistor should be used in
series with each input to limit current during overload conditions.
The AD8222 can safely handle a continuous 6 mA current. The
limiting resistor can be computed from
Ω
400
mA
6
SUPPLY
IN
LIMIT
V
R
For applications in which the AD8222 encounters extreme over-
load voltages, such as cardiac defibrillators, external series
resistors and low leakage diode clamps, such as the BAV199L,
the FJH1100, or the SP720, should be used.
Differential Input Voltages at High Gains
When operating at high gain, large differential input voltages
can cause more than 6 mA of current to flow into the inputs.
This condition occurs when the differential voltage exceeds
the following critical voltage:
VCRITICAL = (400 + RG) × (6 mA)
This is true for differential voltages of either polarity.
The maximum allowed differential voltage can be increased by
adding an input protection resistor in series with each input.
The value of each protection resistor should be
RPROTECT = (VDIFF_MAX VCRITICAL)/6 mA
RF INTERFERENCE
RF rectification is often a problem when amplifiers are used in
applications where there are strong RF signals. The disturbance
can appear as a small dc offset voltage. High frequency signals
can be filtered with a low-pass, RC network placed at the input
of the instrumentation amplifier, as shown in Figure 48. The
filter limits the input signal bandwidth according to the
following relationship:
)
(2
2
1
C
D
Diff
C
R
FilterFreq
C
CM
C
R
FilterFreq
2
1
where CD ≥ 10CC.
R
AD8222
+15V
+IN
–IN
0.1F
10F
0.1F
REF
VOUT
–15V
R1
499
CD
10nF
CC
1nF
CC
1nF
4.02k
05
94
7-
04
8
Figure 48. RFI Suppression
Figure 48 shows an example where the differential filter fre-
quency is approximately 2 kHz, and the common-mode filter
frequency is approximately 40 kHz.
Values of R and CC should be chosen to minimize RFI. Mismatch
between the R × CC at the positive input and the R × CC at
negative input degrades the CMRR of the AD8222. By using a
value of CD 10× larger than the value of CC, the effect of the
mismatch is reduced and performance is improved.
COMMON-MODE INPUT VOLTAGE RANGE
The 3-op-amp architecture of the AD8222 applies gain and then
removes the common-mode voltage. Therefore, internal nodes
in the AD8222 experience a combination of both the gained
signal and the common-mode signal. This combined signal can
be limited by the voltage supplies even when the individual
input and output signals are not. Figure 7 and Figure 8 show the
allowable common-mode input voltage ranges for various
output voltages, supply voltages, and gains.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8222BCPZ-RL | 功能描述:IC AMP INST DUAL PREC LN 16LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD8222BCPZ-WP | 功能描述:IC AMP INST DUAL PREC LN 16LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8222-EVAL | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision, Dual-Channel Instrumentation Amplifier |
| AD8222-EVALZ | 功能描述:BOARD EVALUATION FOR AD8222 RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| AD8222HACPZ-R7 | 功能描述:IC AMP INST DUAL PREC LN 16LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:13 V/µs 增益带宽积:3MHz -3db带宽:- 电流 - 输入偏压:65pA 电压 - 输入偏移:3000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
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